Table 2 Patterns of Alcohol Use by Mothers across Pregnancy (N = 1324)
From: Prenatal alcohol exposure and infant gross motor development: a prospective cohort study
| Â | Alcohol use category | ||||
|---|---|---|---|---|---|
Abstinent | Low (≤7 drinks per week, up to 2 per occasion) | Moderate (≤7 drinks per week, > 2 to ≤4 per occasion) | Binge (≤7 drinks per week, > 4 per occasion) | Heavy (> 7 drinks per week, weekly or more) | |
Trimester 1a (first 6 weeks) | |||||
 n (%) | 514 (38.8) | 291 (22.0) | 55 (4.2) | 211 (15.9) | 184 (14.0) |
 Drinking days per week, M (SD) | 0 | 1.09 (1.10) | 0.91 (0.60) | 0.98 (0.87) | 3.73 (1.83) |
 Typical grams consumed per occasion, M (SD) | 0 | 12.70 (4.11) | 28.31 (4.30) | 38.22 (29.33) | 50.74 (54.01) |
 Typical grams consumed per week, M (SD) | 0 | 17.50 (17.70) | 27.50 (18.55) | 30.81 (21.51) | 181.16 (200.02) |
Trimester 1b (second 6 weeks) | |||||
 n (%) | 943 (71.2) | 224 (16.9) | 24 (1.8) | 41 (3.1) | 24 (1.8) |
 Drinking days per week, M (SD) | 0 | 0.58 (0.63) | 0.66 (0.64) | 0.80 (0.67) | 3.62 (1.80) |
 Typical grams consumed per occasion, M (SD) | 0 | 11.13 (4.81) | 29.44 (4.16) | 28.21 (20.07) | 74.36 (121.52) |
 Typical grams consumed per week, M (SD) | 0 | 8.32 (9.11) | 18.74 (19.15) | 32.43 (23.56) | 27.18 (43.05) |
Trimester 2 | |||||
 n (%) | 894 (67.5) | 339 (25.6) | 37 (2.8) | 14 (1.1) | 13 (1.0) |
 Drinking days per week, M (SD) | 0 | 0.70 (0.72) | 0.80 (0.65) | 1.23 (0.90) | 4.40 (2.10) |
 Typical grams consumed per occasion, M (SD) | 0 | 12.46 (3.82) | 29.64 (3.45) | 25.14 (14.77) | 58.23 (75.12) |
 Typical grams consumed per week, M (SD) | 0 | 9.04 (10.39) | 23.42 (20.28) | 34.39 (21.65) | 189.72 (223.25) |
Trimester 3 | |||||
 n (%) | 902 (68.1) | 337 (25.5) | 31 (2.3) | 10 (0.8) | 13 (1.0) |
 Drinking days per week, M (SD) | 0 | 1.30 (0.40) | 2.93 (0.32) | 3.30 (16.20) | 2.31 (1.50) |
 Typical grams consumed per occasion, M (SD) | 0 | 12.82 (3.60) | 29.27 (3.19) | 32.50 (1.62) | 23.08 (14.51) |
 Typical grams consumed per week, M (SD) | 0 | 11.89 (12.90) | 25.38 (18.58) | 29.06 (25.04) | 111.92 (34.97) |